Although the imaging appearance of dermoid tumors is characteristic, several other intracranial lesions must be considered in the differential diagnosis, such as epidermoids, teratomas, lipomas, craniopharyngiomas, and occasionally arachnoid cysts.

You'll find characters such as the massive Empress of Racnoss - a giant arachnoid from deep within space and Davros the wizened scientist who turned his own race into Daleks, plus many more of the Doctor's enemies along with information about the characters and the roles they played.

2 mm, arachnoid, appressed, pale brown; veins simple or 1-forked, slightly immersed on both sides, ending in small hydathodes; fertile fronds similar to the sterile ones, but pinnae narrower, 3-5 mm wide; sori limited to the central part of the pinnae, i.

1) The pathophysiologic mechanism of this phenomenon can be explained by the obliteration of the arachnoid villi by blood clots and by the development of adhesive arachnoiditis in response to irritative blood degradation products.

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